1==============================
2Cirrus Logic EP93xx ADC driver
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4
51. Overview
6===========
7
8The driver is intended to work on both low-end (EP9301, EP9302) devices with
95-channel ADC and high-end (EP9307, EP9312, EP9315) devices with 10-channel
10touchscreen/ADC module.
11
122. Channel numbering
13====================
14
15Numbering scheme for channels 0..4 is defined in EP9301 and EP9302 datasheets.
16EP9307, EP9312 and EP9312 have 3 channels more (total 8), but the numbering is
17not defined. So the last three are numbered randomly, let's say.
18
19Assuming ep93xx_adc is IIO device0, you'd find the following entries under
20/sys/bus/iio/devices/iio:device0/:
21
22  +-----------------+---------------+
23  | sysfs entry     | ball/pin name |
24  +=================+===============+
25  | in_voltage0_raw | YM            |
26  +-----------------+---------------+
27  | in_voltage1_raw | SXP           |
28  +-----------------+---------------+
29  | in_voltage2_raw | SXM           |
30  +-----------------+---------------+
31  | in_voltage3_raw | SYP           |
32  +-----------------+---------------+
33  | in_voltage4_raw | SYM           |
34  +-----------------+---------------+
35  | in_voltage5_raw | XP            |
36  +-----------------+---------------+
37  | in_voltage6_raw | XM            |
38  +-----------------+---------------+
39  | in_voltage7_raw | YP            |
40  +-----------------+---------------+
41